Chocolate Nutella Semifreddo

INGREDIENTS

large eggs (at room temperature)

1/4 cup

granulated sugar

Nutella ((400 gram jar))

1 cup

heavy cream

1 tbsp

chocolate or hazelnut liqueur ((or vanilla extract))

4 oz

bittersweet chocolate (shaved)

2/3 cup

pistachio nuts (roasted, coarsely chopped)

Chocolate curls ((for decoration))